51112539648 has 200 divisors, whose sum is σ = 154656460728. Its totient is φ = 16803127296.

The previous prime is 51112539641. The next prime is 51112539727. The reversal of 51112539648 is 84693521115.

It is a happy number.

51112539648 is a `hidden beast` number, since 51 + 1 + 1 + 2 + 539 + 64 + 8 = 666.

It is a super-2 number, since 2×51112539648² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51112539641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3019015 + ... + 3035897.

Almost surely, 2^51112539648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51112539648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77328230364).

51112539648 is an abundant number, since it is smaller than the sum of its proper divisors (103543921080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51112539648 is an equidigital number, since it uses as much as digits as its factorization.

51112539648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16986 (or 16961 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 51112539648 in words is "fifty-one billion, one hundred twelve million, five hundred thirty-nine thousand, six hundred forty-eight".